Satellite-Ground Link Planning for LEO Satellite Navigation Augmentation Networks

Navigation augmentation using low-orbit satellites is a low-cost, high-precision technique. Efficient transmission of data between the satellites and ground station is a prerequisite to ensure that this technique can be achieved. Satellite-ground link planning directly affects the transmission efficiency. In addition, appropriate planning of the links enables the reduction in the routing calculation and link switching overhead. In view of the data transmission characteristics of a satellite navigation augmentation network, this paper optimizes the ground-satellite link planning with respect to three aspects: link switching frequency, routing update frequency, and relay satellite configuration. By focusing on the above three aspects, we propose a link planning algorithm with the minimum number of link switching times, minimum number of route updates, and relay satellite configuration constraints. Finally, the simulation results are presented to demonstrate the performance of the proposed algorithm.